refactor: rename modules and update migration docs

BREAKING CHANGE
Module paths moved to `github.com/HugoBlox/kit` with new names:
- core `blox-tailwind` → `blox`
- analytics → `analytics`
- netlify → `integrations/netlify`
- slides (reveal) → `slides`
Update go.mod, module.yaml/params, scripts, tests, and v0.11 migration guide accordingly.

modules/analytics/README.md

@@ -0,0 +1,27 @@
+# Analytics module
+
+**A Hugo Blox module for website analytics and search engine verification.**
+
+Are you using the `blox` module? The analytics module is already included, so you do not need to install it. For all other sites, refer to the installation guide below.
+
+## Install
+
+Get analytics and verification for your Hugo site by following the guide below:
+
+1. Add the module to your `config/_default/hugo.yaml`:
+
+   ```yaml
+   module:
+     imports:
+       - path: github.com/HugoBlox/kit/modules/analytics
+   ```
+
+2. Load the module in your site's `<head>` with:
+
+   ```go
+   {{ partial "blox-analytics/index" . }}
+   ```
+
+## Usage
+
+[View the documentation](https://docs.hugoblox.com/reference/analytics/)